Method for electrically degrading ceftazidime in water by adopting Fe3O4/biomass carbon cathode

Abstract

The invention relates to a method for electrically catalytically degrading ceftazidime in water by adopting a Fe3O4 / biomass carbon cathode, and relates to a preparation of an electric catalytic cathode and application of a degrading method. The invention aims at solving the problems that the traditional Electro-Fenton process is low in H2O2 yield, poor in degrading effect, easy to generate a greatamount of iron sludge on the cathode and the like. The method comprises the following steps: I, preparing Fe3O4 / biomass carbon; II, preparing a cathode catalyst layer; and III, determining technological parameters of Fe3O4 / biomass carbon cathode for degrading the ceftazidime wastewater. The electric catalytic degradation rate of the cathode prepared by the method for the ceftazidime can reach 95percent. A carbon source of the biomass carbon is waste shaddock peel, the catalyst active components and carriers can be reused, and the electrode is simple in preparation process, low in productioncost, and actually energy-saving and environmentally friendly.

Description

technical field [0001] The invention relates to a technical method for the electrocatalytic degradation of antibiotic ceftazidime in water, and belongs to the fields of environmental protection wastewater treatment technology and electrochemical technology. Background technique [0002] With the development of medical care, cephalosporin antibiotics have become the most active and widely used antibiotic drugs. In my country, the use of cephalosporin antibiotics in hospitals accounts for more than 45% of all antibacterial drugs. Ceftazidime, as a semi-synthetic broad-spectrum β-lactamase resistant third-generation cephalosporin antibiotic, has a good antagonistic effect on Gram-positive and Gram-negative bacteria. Due to the complex structure and antibacterial properties of ceftazidime, it has the characteristics of high biological toxicity and persistence in the environment; therefore, the production wastewater of ceftazidime belongs to refractory organic wastewater. Genera...

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Problems solved by technology

However, due to the limitations of electrode structure, electrode composition, electrode catalytic activity and dissolved oxygen concentration in water, Fe 2+ The cathode regeneration performance is poor, and a large amount of iron sludge is easily produced, which not only affects the mass transfer efficiency of the system, but also increases the cost of the process for subsequent sludge disposal. Therefore, it is necessary to explore ways to improve the H 2 o 2 Generate efficiency and optimize process conditions to promote Fe 2+ The reduction and regeneration of E-Fenton technology is the key to the large-scale application of E-Fenton technology

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